HELEN :
Most of them. Hoover was a complete imbecile, and Harding, well, sadly, he couldn't stay in human form for much longer than he did.

WILL :
Harding...was an abnormal?

HELEN :
You think a normal person would choose a job that impossible? Don't be ridiculous.

WILL :
The people that you've met, the history that you've witnessed, how do you relate to anybody? Dinner parties must be hell.

HELEN :
History is just that, Will; it's history. We've all experienced it. I just have more under my belt than most people.

WILL :
No, no, no, no, you were in Rheims the day the Nazis surrendered. You were right there in the room when it happened.

HELEN :
Only because Eisenhower refused to be in the same room as General Jodl; and asked that I accompany General Smith to ensure that the process went smoothly.

WILL :
I guess Ike didn't want to breathe the same air as the Nazi High Command.

HELEN :
Some of them didn't even breathe air.

[A beeping sound is heard.]

HELEN :
That'll be Henry.

[Helen engages a view screen.]

HENRY (on a screen via a satellite call) :
Ahoy, Mateys!

[Helen shakes her head as Will snickers.]

HENRY :
It's because you're at sea.

HELEN :
Henry, are you certain these are the proper coordinates?

HENRY :
Absolutely. I traced the psychic signal Sally received to where you are right now, but she says that, since you left port, there's been, uh, no further communication from her people.

HELEN :
Did you say Sally?

HENRY :
That was his idea.

[Henry brings his hand up to be seen in the video and points in the direction of Will.]

WILL :
It's our nickname for the Sanctuary mermaid.

HELEN :
She has a proper name, you know.

WILL :
Which is unpronounceable.

HENRY :
It's a true fact.

WILL :
Besides, it beats calling her something obvious, like...Ariel.

HENRY :
Marina.

WILL :
Oceana.

HENRY :
Ursula.

HELEN :
If you two are finished?

HENRY :
So are you guys there? In the middle of it, right now?

HELEN :
It's not that exciting, Henry.

HENRY :
Come on, are you kidding me? Doc, you're in the middle of the Bermuda Triangle! People have been speculating about that part of the ocean for centuries. Missing ships, and planes disappearing. Come on!

WILL :
You know, he's right. There's been reports of lost time and doors to other dimensions...

HENRY :
Alien abductions.

HELEN :
It's the ocean; seriously.

WILL :
Okay.

HELEN :
Henry, we'll call you when we've made contact with the Mer-folk.

HENRY :
Okay, but if you find those missing airmen from WWII--

[Helen hits a switch to terminate the call from Henry.]

HENRY :
No, no, don't, don't, don't--

[The screen turns off.]

WILL :
You know, I got to admit, it is kind of cool. You know, to be in such a legendary place.

HELEN :
Other than a high concentration of abnormal sea life, there's nothing particularly special about this place.

WILL (mimacing Helen’s accent)
Then why do all the Mer-folk choose to live here?

HELEN :
Why does any species live anywhere? Food supply, temperate climate, safety.

WILL :
So it's not, like, magnetic waves, or a time portal, or something like that?

HELEN :
You've seen too many B-Movies.

WILL :
Hey, our whole life is a B-Movie. It's a classic, don't get me wrong, but still...

[Helen is looking at the readouts from the submarine controls.]

HELEN :
We are significantly deeper than their usual home depth.

WILL :
But she was sure she heard a psychic distress signal, right?

[Will moves to sit and watches video from outside the submarine.]

HELEN :
Yea, she described it as a series of remotely viewed images; flashes of anger, violence, and then nothing at all.

WILL :
That's scary; radio silence from your home town.

[Will sees a disturbing scene on the video monitor.]

WILL :
Hey, I thought the Mer-folk were supposed to be a peaceful species.

HELEN :
They are.

WILL :
Well, something's changed. Check this out.

[Helen comes over and looks over Will’s shoulder at the view screen. A mutilated body of a Mermaid is seen floating]

WILL :
Some kind of massacre.

[Helen goes back to the control monitor.]

HELEN :
It was. Scans are indicating no life signs at all.

WILL :
Look at this, it's like they've been torn to shreds or something.

HELEN :
Maybe it's a new type of species, a predator that's claimed this as its feeding ground.

WILL :
Yeah, like a giant shark, or...a sea creature? Maybe a kraken?

HELEN :
Kraken? Please, that's a complete myth.

WILL :
Glad I didn't say "sharktopus."

HELEN :
I can't think of anything that would cause this sort of widespread devastation, not to these people.

[Submarine extends a mechanical arm to bring in the body]

INT SUBMARINE

[Helen is performing an autopsy wearing protective apron, goggles and gloves. Will is leaning on the table observing; also wearing protective gear.]

HELEN
Torso severed below the breastplate. Without decomposition, it's hard to tell how long she's been dead.

WILL :
You know, these aren't teeth-marks, which rules out our predator theory.

HELEN :
They may be a peaceful species, but they aren't without resources or resolve. They know how to fight back when provoked.

WILL :
Okay, so it wasn't a feeding by another creature, it was an all-out attack. You think it could have been humans?

HELEN :
Possibly, considering the number of dead; it may well be genocide.

WILL :
What if it was an accident? A military maneuver, a depth charge, or a floating mine?

HELEN :
There would have been heat damage, shrapnel. I see neither. Excuse me.

[Helen moves up to where Will was standing to work.]

WILL :
Well, I’m just saying, for the record, Bermuda Triangle equals mystery.

WILL :
Can you think of any reason for these people to go to war with themselves?

HELEN :
No, they rely on each other greatly for survival. Their society's incredibly benevolent.

WILL :
How many you think died?

HELEN :
By my count, over a hundred. Considering how rare they are as a species, it's catastrophic.

EXTERNAL VIEW OF SUBMARINE POWERING UP

INTERIOR SUBMARINE

[Helen setting some controls. Will shuts a door and moves forward to where Helen is.]

WILL
All right, we are all packed up. Hey, listen, are you sure you want to head home? I keep thinking there must be some evidence down here that could tell us what really happened.

[Will takes a seat behind Helen.]

HELEN :
We've run several sweeps of the area so far there's nothing else out there. The sooner we get these samples back for a detailed analysis, the more we'll know about this event.

WILL :
All right

HELEN :
Though I’m glad you're so keen to stay; Ashley said you were dreading this trip.

WILL :
Well, truthfully, trapped 10 hours in a tin can is not my idea of the most appealing mission.

HELEN :
Oh, but it's 10 hours trapped in a tin can with me, and all your questions.

WILL :
That's true.

HELEN :
We should be back in San Juan inside of six hours.

WILL :
I'm going to get some shut-eye before we get to port.

[Will heads to the back of the submarine.]

HELEN :
All right.

[Helen shows signs of a headache and her hand begins to shake.]

INTERIOR SUBMARINE

[Helen has adjusted some controls and moves to the back of the submarine. She walks past Will who is lounging on a cot reading a book on the Bermuda Triangle. Will hears a clatter.]

WILL :
Magnus?

[Will rushes to Helen who has collapsed.]

WILL :
Hey... you okay?

HELEN :
Will, something's wrong.

[Helen has blood coming out of her ear and her nose begins to bleed.]

HELEN :
Ah, my head!

[Helen grabs her head in pain.]

WILL :
You're bleeding.

HELEN :
The pressure! You don't feel it?

[Helen pulls herself up.]

WILL :
No, I’m fine.

HELEN :
We have to stop it.

[Helen moves to the forward compartment to the controls.]

WILL :
What?

HELEN :
We have to stop rising!

WILL :
Wait, what's going on?

HELEN :
I have no idea! All I know is it's getting worse the shallower we go!

WILL :
How could you be suffering the Bends?

[Helen grasps in pain.]

HELEN :
Ah, Go! We have to go deeper!

WILL :
No, listen, I think you need medical attention.

HELEN :
Extra-Cranial bleeding isn't usually a good thing, Will. I don't think I’d survive another ascent. We have to go back down again.

WILL :
No, that could make you worse.

HELEN :
I know! But...

WILL :
What are you doing?

HELEN :
Taking us back down to our original depth so we can understand this better.

WILL :
Magnus, I don't think that's a good idea.

HELEN :
I have no choice!

EXTERIOR SHOT OF SUBMARINE MOVING ALONG THE DEPTHS

[Will is taking Helen’s blood pressure.]

WILL
We're back at our original depth.

HELEN :
Normally, the shoe's on the other foot.

WILL :
Well, if I had to guess, I’d say you suffered some sort of mild seizure; your blood pressure's through the roof, reaction times are sluggish. Still, you were right about going to a lower depth. It seems to have relieved the pain.

HELEN :
I've done hundreds of dives before; nothing like this has ever happened, and as you said, the atmosphere in here is regulated to near sea level. Neither of us should feel anything as we surface.

WILL :
But still, bleeding from the ear and nose, disorientation, dizziness...if that's not the Bends, then what is it?

HELEN :
Something else. If we had a cat scan on board, we'd know more. I'd like to do some blood work, see how high my nitrogen levels are, rule out any infections or diseases that could have triggered this.

INTERIOR SUBMARINE

[Monitor shows an enhancement of the cells which Helen has under a microscope.]

HELEN :
Give it time; I've asked it to look for a lot of different things.

WILL :
How are you feeling?

HELEN :
Fine.

[Helen moves forward.]

WILL :
Are you sure?

[Will follows her.]

HELEN :
I'm sure.

[Helen turns to see Will standing next to her. She smiles.]

WILL :
Look, I’m sorry. I don't mean to follow you around. If you want to be alone while we wait, I can hang in the back or something.

HELEN :
Don't be ridiculous. If you have more questions to ask, now would be the time.

[Helen goes back to sit near the microscope.]

WILL :
Oh, come on, now you're humoring me.

HELEN :
No, nothing better to do while the computer analyzes my blood.

WILL :
Okay.

[Will sits next to Helen.]

WILL :
So I’m guessing by how quiet Ashley’s been that she knows Druitt is her father.

HELEN :
She does.

WILL :
And?

HELEN :
And what?

WILL :
Well, she just found out the her dad is the actual Jack the Ripper that's got to put some strain on your relationship.

[Helen doesn’t look up from the microscope.]

HELEN :
She's fine. We talked.

WILL :
Okay. Case closed.

[Helen finally looks up from the microscope.]

HELEN :
I know my daughter, Dr. Zimmerman; she will come around, once she understands why I kept the truth from her.

[Helen gets up and moves to the back of the submarine.]

WILL :
You see? You did it right there.

[Helen stops and turns to Will]

WILL :
You invite questions, and then when you don't like where they lead, you just walk away.

HELEN :
That's hardly fair.

WILL :
You just called me "Dr. Zimmerman" And left the room.

[Helen sighs and moves to stand in the hatchway.]

HELEN :
I'm frustrated.

WILL :
Why? Because we can't surface?

HELEN :
Because I can't relate to Ashley.

WILL :
Well, she's 23. No species on earth can relate to people that age.

HELEN :
Spare me the platitudes. You've no idea what it's been like.

WILL :
Which is why I ask the questions that I do.

HELEN :
Why? Because you see me as some sort of curiosity? Some perverse form of entertainment for you to enjoy?

[Helen turns sharply and sits at a nearby desk in the other compartment. Will remains where he was.]

WILL :
No, not at all. It's because I’ve never had this before—

[Helen rests her elbows on the desk and places her face in her hands.]

WILL :
A challenge, a mentor that I could really believe in.

[Helen lowers her hands and turns slightly to look at Will.]

WILL :
You know, Magnus,working at the Sanctuary is more than just a job to me. It's...

HELEN :
What?

WILL :
It's the only family I’ve ever had.

[Helen looks up at ceiling and sighs. Will gets up and moves to stand in the hatchway near Helen. Helen turns and faces Will.]

HELEN :
When you've been alive for as long as I have...you learn not to get too close to people.

[Will walks in and sits beside Helen.]

HELEN :
I've buried a lot of friends, colleagues, lovers; more than you can imagine. You asked me earlier how I could relate to people? Well...dinner parties are hell.

WILL :
Is that your way of saying that I’m boring?

HELEN :
Far from it. In fact, you're the first protégé I’ve had in decades who's shown any real promise. You're doing brilliantly, Will, and I should say it more often.

WILL :
Really?

HELEN :
I know that if anything should happen to me, you'll be there to continue my work.

WILL :
Come on, Magnus, it's way too early to start talk--

HELEN :
You are ready, you just don't know it yet.

WILL :
Magnus...

[Helen’s nose starts to bleed.]

HELEN :
Oh, dammit.

WILL :
Listen, we've got to get you to a hospital.

HELEN :
No!

WILL :
We don't have the proper medical supplies aboard to deal with--

HELEN :
Just go deeper!

WILL :
We can't

HELEN :
Just do it!

WILL :
Okay, you got to tell me what to do.

[Will moves toward the controls.]

HELEN :
Navigation, minus 30 feet.

WILL :
Navigation. You mean this command right here?

HELEN :
Ahh...

[The pain is unbearable and Helen gets up and sits next to Will who is at the controls.]

HELEN :
Joystick, 20 degrees starboard.

[The submarine dives to 1575 depth.]

WILL :
Cool?

[A teary eyed Helen nods in relief.]

INTERIOR SUBMARINE

[Helen and Will are seated in front of computer looking at the results.]

WILL :
Negative for nitrogen narcosis. No toxins found. No sign of meningitis, your T-Cell count is good...

HELEN :
Which leaves us squarely in the dark as to my condition, except that it's getting worse.

[Noise from sub adjusting to depth causes Will to look concerned.]

HELEN :
Don't worry. It's just the hull adjusting to the new depth; perfectly normal.

WILL :
How deep can the Nautilus go?

HELEN :
Deeper. It's built for mid-range submersion, not deep-sea exploration. Crush-Depth is 2,400 feet, and we are sitting at...just below 1,600 right now.

WILL :
What about our oxygen?

HELEN :
Day and a half.

WILL :
Okay, so...as long as we stay low and conserve our air, we should have time to figure this out. Maybe we're looking in the wrong place.

[Will gets up to pace.]

HELEN :
What do you mean?

WILL :
Well, we asked the computer to screen your blood for signs of the Bends, infections that cause swelling in the brain, indicators of specific diseases; what if this is an element we haven't seen before?

[Will stops pacing and stands next to Helen.]

WILL :
Something new to cross the blood-Brain barrier?

HELEN :
A parasite of some kind?

[Helen types commands into the keyboard.]

WILL :
Yeah. You mentioned an unidentified fluid in the cranial wall of that mermaid.

HELEN :
I'm changing the parameters of the analysis.

WILL :
What's it going to look for?

HELEN :
Any elements in my system that can't be identified. I'm including cerebrospinal fluid in the search.

[The computer signals results and shows them on the screen.]

HELEN :
Dear God.

WILL :
What the hell is that?

HELEN :
A microscopic parasite in the pyramidal tract of my brain stem.

WILL :
It's multiplying.

HELEN :
At an alarming rate. It's taking over.

INTERIOR SUBMARINE

[Helen, in full hazmat gear, is performing another autopsy on the mermaid.]

HELEN :
I hate being right.

WILL :
I don't like the sound of that.

HELEN :
The limbic system is all but destroyed. The brain's logic center has been degraded beyond recognition.

[Will is watching the autospy on a monitor in the other compartment.]

WILL :
Any idea how it got passed to you? We wore protective clothing the whole time.

[Will gets up and goes to look through the small window in the door.]

HELEN :
Actually yes, near-invisible perforations in the gloves I used during the first examination. Our new life form has aggressive abilities, even at the microscopic level. Your gloves were intact, and your blood work came back clean, so I’m guessing as long as we don't exchange bodily fluids, you shouldn't get infected.

WILL :
Okay. Listen, do you want anything, while you work? A snack? Some music? Lower depth?

[Helen’s hands begin to shake and she stares off into space.]

Will :
Magnus?

[Helen snaps out of it.]

HELEN :
I'm fine.

WILL :
Any idea why it chose to attack the brain as opposed to the other organs? I mean, aren't there more nutrients in say, the stomach lining?

WILL :
Includes the hippocampus and amygdale; controls for fear, emotion, rage. If something was negatively impacting their behavioral centers, then--

HELEN :
They tore each other apart.

WILL :
Then that's why there was no evidence of any other species or humans in the area. Magnus, how long do you think--

HELEN :
I don't know. It could be hours or days before it affects me, but it will affect me.

INTERIOR SUBMARINE

[Will is pacing the compartment as Helen sits at a table.]

WILL :
So we surface, it kills you. We stay down here, you potentially turn into a killer.

HELEN :
Unless we run out of air first. I for one don't like any of those scenarios.

[Helen is preparing a syringe.]

WILL :
Have you found anything that might work?

HELEN :
I don't have any anti-parasitic drugs, per se but a massive cocktail of antiviral and antibiotic solutions may help.

WILL :
Are you sure you want to mix drinks like this?

HELEN :
At worst, they'll make me very ill. At best, they'll make my body a rather inhospitable host.

[Helen injects herself.]

HELEN :
It may take a few doses and some time before we feel its--No...

[Helen’s nose starts to bleed. Will kneels down and grabs Helen’s arm in concern.]

WILL :
Magnus?

HELEN :
Deeper.

WILL :
No.

HELEN :
Take us deeper.

[Helen grabs Will by the throat and forces him up against the wall.]

WILL :
We're almost at maximum depth.

[Helen wipes blood on her finger and thrusts it toward Will’s face. Will grabs her arm holding it away.]

WILL :
Hey...hey! Okay, okay...we'll go deeper.

[Helen releases Will. Helen shows more signs of pain as Will moves to the controls for the submarine.]

EXTERIOR VIEW OF SUBMARINE MOVING DEEPER IN DEPTH

INTERIOR SUBMARINE

[Will looks at gages, and hears a knock at the door. Helen is locked on the other side of the door. Helen gives Will a pleading look. Will unlocks the door.]

HELEN :
I wanted to apologize. I would never have deliberately infected you. I just...I need to convince you.

[Helen and Will move to sit across from each other.]

WILL :
Was it the pain or just because you lost control?

HELEN :
It was the pain, I promise you.

WILL :
You are the most measured, rational person that I’ve ever met, and now I’m seeing heightened emotions, rage, threatening actions....this is all behavior driven by the limbic system. None of this is in your nature.

HELEN :
You don't trust me anymore.

WILL :
Should I?

HELEN :
I'm still me, Will.

WILL :
Yeah, but for how long?

HELEN :
For as long as I can keep it at bay.

WILL :
I just don't understand why it's reacting this way. I mean, if we go too deep, the sub will implode, and you'll die, and the parasite will lose you as a host.

HELEN :
I don't think it's a rational, thinking life form, Will. It likely invades a host, lives in it for as long as it can, and then moves on. I doubt it's as intelligent as a virus or a virulent bacterial strain.

WILL :
So, what do we do?

HELEN :
For the moment, we try to stop it from affecting me as best we can; at least until I can find a way to have it reject me as a host.

WILL :
Which means we go deeper still. It seems to be the only thing that's keeping you pain-free.

HELEN :
And rational.

WILL :
How deep can this thing actually go beyond 2,400 feet?

HELEN :
I don't know. I've never taken her past maximum depth.

WILL :
But we can adjust the nitrogen, co2, and oxygen levels to accommodate for the increasing pressure, right?

HELEN :
Yes, but that will only last for so long.

WILL :
Then we'll take it slow.

[Helen nods.]

INTERIOR SUBMARINE

[Helen is preparing another syringe.]

WILL :
Can't we just drug you; knock you out, and make the ascent?

HELEN :
Every sedative I’ve tried, the parasite counteracts. Now, assuming that it's taken root in my primal neurologic centers, the damage it would do as we surfaced would likely leave me brain dead.

[Noise from sub adjusting to depth.]

WILL :
I hate when it does that.

[Helen injects the syringe.]

HELEN :
We've not past the safety threshold yet.

[Helen picks up a laptop and turns to face Will who standing a bit behind her.]

HELEN :
Will, there's another scenario we need to discuss.

WILL :
Magnus...

HELEN :
Just listen to me, please. In the event that you believe that my judgment is no longer sound, or that your life is in direct peril, I am depending on you to take care of things in a decisive manner.

WILL :
It's not going to come to that.

HELEN :
This parasite caused an intelligent, peaceful species to tear itself apart; I can only assume that it will do the same to me. I'm counting on you to do the proper thing if the situation requires it.

WILL :
Magnus, you can't expect me to--

HELEN :
Dammit, Will!

[Helen moves forward toward Will. Will backs up against the wall.]

HELEN :
I have lived longer than any human has a right to. In the end, all I can hope is to choose how it ends. Being taken over by an undersea parasite is not on the list.

WILL :
And what is?

HELEN :
Just be creative, if the time comes. Do I have your word?

WILL :
I'm going to see if we have any more medical supplies in storage.

[Will moves to the back of the submarine and closes the door behind him.]

INTERIOR SUBMARINE

[Helen is looking at the gages as she sits at the computer control system. She cringes in pain, her hand hovers over the controls. She watches water drip from the walls. The depth gage is showing the depth increasing past 2400 depth.]

INTERIOR SUBMARINE

[Will is looking through the storage area; he hears the sub walls making noise, he opens a container with weapons in it. An alarm sounds as the sub starts to shake and sparks start to fly as things explode. Will rushes forward to the compartment where Helen is.]

[Will is still standing just inside the hatchway while Helen is frantically working at the controls.]

WILL :
I thought that we were going to take it slow.

HELEN :
Balance systems must be destroyed by the increased pressure! We'll have to reset the system manually!

WILL :
How do we do that?

HELEN :
In the aft!

[They run towards the back of the submarine. Some pipes burst spraying water. Helen grabs the pipes.]

HELEN :
Close the valve, there!

WILL :
Here?

HELEN :
Yes!

[Will turns the valve.]

HELEN :
Come on!

[Helen leads Will farther back, more water is spraying inside, Helen bends down to fix something by the sub wall.)

HELEN :
I need a tool kit!

WILL :
Okay!

[Will runs to get it. Helen suddenly pushes him out of the way to grab it and runs back to fix the problem.]

WILL :
Do you think you can you fix it?

HELEN :
I don't know!

[A spark from the overloaded equipment starts a fire behind Will in the other compartent.]

WILL :
Magnus!

[Will uses fire extinguisher to put out small fire. Will misses the inappropriate smile on Helen’s face. Will returns to where Helen is working. The depth has reached close to 3000 and Will is feeling the increasing pressure. The submarine shakes and a loud bang is heard.]

WILL :
What happened?

HELEN :
We've stopped.

[Helen looks out porthole.]

EXTERIOR OF SUBMARINE HANDING OVER A LEDGE

INTERIOR SUBMARINE

[Helen moves away from porthole and grabs the computer tablet.]

HELEN :
Engine room has been flooded. Same with lower cargo area. Oxygen supply has been damaged. We're down to 50%. The co2 scrubbers are working at full capacity.

WILL :
How much is left?

HELEN :
Less than three hours.

WILL :
What about our engines?

[Helen has put down the tablet and moved back to the submarine controls.]

HELEN :
They're unresponsive. Remote system must have been damaged when the engine room flooded.

WILL :
Where are we?

[Helen taps in some commands.]

HELEN :
On a shelf above the Puerto Rican trench; it must have stopped our descent.

[Will moves forward leaning over to read the monitor and Helen moves back.]

WILL :
That's lucky.

[Helen hits Will over the head with a wrench.]

HELEN
Very.

INTERIOR SUBMARINE

(Will’s vision is blurry as he focuses on Helen laying on floor working on the sub. Helen stops working and looks at Will.)

HELEN (mimicing Will)
"You're not yourself, Helen.” “That thing's got control of you. I can help you, Helen."

[Helen drops the wrench she was holding and puts her hands on the arm of the chair that Will is tyed up to and gets close to Will’s face.]

HELEN :
I know what you're trying to do. You're trying to profile me, aren't you? Like a common criminal; Well, here's a little secret for your box--

[Helen leans up so her mouth is next to Will’s ear and whispers in Will’s ear.]

HELEN :
...I'm not so common.

[Helen leans back to look at Will’s face.]

WILL :
No. No, you're not.

HELEN :
I've figured you out, young William. You think you need to cure me of this. Truth is, you're the one who needs saving, from a life of mediocrity, shame? I've saved you once, I can do it again.

WILL :
You did this. You flooded the ballasts. You made us lose control.

HELEN :
You gave me no choice!

[Helen leans in close.]

HELEN :
I know you want to kill me, and don't tell me it's because I asked you to, because that's not what friends do to each other!

WILL :
Okay, I wanted to kill you.

HELEN :
Ha!

[Helen moves back to return working on submarine.]

WILL :
Okay, I wanted to kill you, but now I see that's not such a good idea.

HELEN :
Why!

WILL :
Because you're the only one who can control this sub. There's no sense in both of us dying.

HELEN :
You see? You see how good it feels when you talk sensibly? Still...

[Helen pulls a gun on Will.]

HELEN :
I think I should kill you now.

[Helen holds the gun inches from Will’s face.]

WILL :
I don't think you mean that.

HELEN :
Really?

WILL :
You want me to feel it; the sunshine?

HELEN :
Yes...

WILL :
The drug? Well, then, we...we have to go deeper.

[Helen lowers the gun.]

WILL :
We have to go deeper so that we both can feel it together.

[Helen has moved up to her earlier position close to Will.]

HELEN :
So much deeper.

WILL :
We can't stay here.

HELEN :
You're right. We have to go someplace else.

WILL :
Yeah.

[Helen slaps Will’s face and then places her palm over his face.]

HELEN :
Good boy. Stay.

[Will struggles with his bindings as Helen goes to the back of the sub. She grabs an air tank and then opens a hatch and goes under water. She tries to access controls but is unable to. Will manages to free himself and grabs the computer tablet moving it to the other compartment. He rushes to the back of the submarine; he sees the gun Helen had sitting on a shelf and the open hatch leading down into the water. He goes to close the hatch, but Helen is there pushing up on it. Will backs off.]

HELEN :
Very clever. Best protégé ever.

[Helen climbs out of water and sits on the top of the hatch.]

HELEN :
I was just coming to find you anyway.

[Helen jumps down and picks up the air tank.]

HELEN :
I can't repair the ballast control unless we open up a panel. I kinda of need your help.

[Helen notices Will looking toward the gun.]

HELEN :
Unless you think you can get to that gun first.

[Helen hands Will an oxygen tank.]

HELEN :
After you! Water's lovely.

[Will and Helen put on diving masks with their air tanks and enter the water.]

WILL :
It's freezing! I can't stay out here--

HELEN :
Look at me! I need you to pull these bars back so I can access the control panel. Do it!

WILL :
Okay! Okay...

HELEN :
Almost there.

WILL :
It's too cold, I can't...

HELEN :
Pull harder, dammit! That should do it. Yes, we have control now.

WILL :
We're good?

HELEN :
You're not.

[Helen pulls Will’s mask off making him rush out of the tank. Helen follows Will out of the water. Will rushes over to grab the gun and points it at Helen who has just reach the top.]

HELEN :
Not too creative. Don't miss.

[Helen gets out of the water, climbs down from hatch and walks toward Will.]

HELEN :
Well? What are you waiting for? Do it!

WILL :
Fight it, Magnus. Fight it! The parasite doesn't care whether you live or die! It'll just move on to another host and do it all again!

HELEN :
Shoot me, you coward. Shoot me!

WILL :
Give me a reason not to!

[Helen grabs the gun away from Will and pushes him up against the wall with her arm against his throat.]

HELEN :
You weak, pathetic little bastard. Do you think this is what I wanted? This life?

[Helen hits Will with her elbow.]

HELEN :
I have suffered for so long, totally alone, and, honestly, Will...no one lives forever.

[Helen draws the gun and points it at Will, she pulls the trigger...the gun is empty.]

HELEN :
Oh well. Time we were on our way.

[Helen moves forward to the control room. Will coughs and looks down at his hand holding the gun clip he has removed. Helen locks the door, looks at the screen and turns controls to lower the depth.)

HELEN :
Come on...that's working.

(Helen hears a noise, and sees the air stop coming through the vent. She rushes around the room checking the vents.)

HELEN :
Come on...no...

[Helen tries to open the door, but finds it won’t turn. Will has wedged something in the door so that it won’t turn. Will is on the other side of the door with the tablet making adjustments.]

HELEN :
Oh, no, you don't.

[Helen goes to the control screen and finds the controls locked.]

HELEN :
What?

[Controls show air supply decreasing and co2 levels rising. Helen moves to the door.]

HELEN (begs with Will through the door window) :
Don't do this!

[Will has moved to look through the door window as Helen begs.]

HELEN :
Please! You can't do this! Please! Will...no!

[Helen rushes back to the control panel in even more of a panic.]

HELEN :
No! No!

[Will leans back against wall in distress.]

HELEN :
No...no!

[Not able to do anything with the controls Helen returns to the door window. Helen begs Will through the window.]

HELEN :
Let me out! Please!

[Helen falls to the floor, gasping for air. Will looks through the window. Helen takes a last breath, her eyes fixed and open. Will, works on the tablet, he unlocks the door and carries in a first aid kit and a bag. He sees Helen laying dead on the floor. Will sees the translucent parasite coming out of Helen’s ear, moving away from her body. Will backs away. He kicks a hose loose and sprays liquid nitrogen at the cobra looking parasite freezing it instantly.]

WILL :
Magnus? You're going to be okay, all right?

[Will gets an ambu mask out and puts it over Helen’s nose and mouth and starts pumping air into Helen’s lungs.]

WILL :
Come on, come on...

[Will gets out electical shock paddles]

WILL :
Stay with me, Magnus!

[He delivers a shock to Helen.]

WILL :
Oh, come on. Magnus? Stay with me!

[He injects a syringe into Helen’s chest and checks for a pulse.]

WILL :
Oh, come on. Magnus! Don't do this.

[Will’s about to inject a long needle into Helen’s chest, when Helen’s hand come up and stops him.]

HELEN :
Thank you, Will. That'll be quite enough.

[Will leans down with his hands on his head. Helen reaches up and rubs his head.]

HELEN :
Well done.

EXTERNAL SHOT OF SUBMARINE

[Will looks at the control monitor and then walks back to join Helen in the other compartment. Helen is sitting at a table wrapped in a blanket and a hot drink in her hand.]

HELEN :
You all right?

WILL :
Me? What about you?

HELEN :
Feeling much more myself, thank you.

WILL :
I can't believe I did what I did.

HELEN :
You had to. We both know it would never have left me while I was still alive. As deaths go, it was... very creative.

WILL :
Magnus, never, ever ask me to kill you again.

HELEN :
It was an impossible decision; you did the right thing, Will.

WILL :
You know, I know you've been alive a long time, but maybe you need to accept that there's a reason for that. Your work isn't done.

HELEN :
My work will never be done, which means that you have to accept the fact that one day, you may have to carry on without me.